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Finding the Fourth Proportional to 706.43, 974.57 and 485.00

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Solution

The fourth proportional to 706.43, 974.57 and 485.00 is: 669.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.43 : 974.57 = 485.00 : x
  2. Step 2: Convert to fraction form
    706.43/974.57 = 485.00/x
  3. Step 3: Cross multiply
    706.43x = 974.57 × 485.00
  4. Step 4: Simplify right side
    706.43x = 472,659.15
  5. Step 5: Solve for x
    x = 472,659.15/706.43
  6. Step 6: Final answer
    x = 669.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.